Inlet Adapters, plus possibly more.

[Dean]

And for the spacer...

Please note these can be 4 to 5 stud conversions may even possibly 6 stud. (where applicable on PCD)
4x108 to 5x100
etc.
Any thickness (Within reason / added charge if i need to buy in thicker stock billet.) or just the plain 4 to 4 spacer, any thickness (within reason)

well heres a rough example i'm making for Dean, just for 4 stud conversion, with 20mm spacing.

[attachment=12275]

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adaptor looks fine, can you make the connector 2.5" aswell?

Can do any size really, it will have the same shape, but the height dimensions will be different obviously, but will be checked on Dean's 306 to make sure the bonnet etc shuts.